Pumping rig



May 9, 193g. A, N PORTER 2,157,628

PUMPING RIG i @Ej INVENTOR ATTORNEY May 9, 1939- I A. N. PORTER2,157,628

PUMPING RIG Filed Jan. ll, 1957 2 Sheets-Sheet 2 ATTORN EY Patented May9, 1939 UNETED STATES PATENT OFFIQE PUMIPING RIG Application January 11,1937, Serial No. 120,049

2 Claims.

This invention relates to pumping rigs, particularly those used inpumping voil wells, and has for its principal object to provide anapparatus ,of this character which is constructed to withstand the heavyduty required in .operating extremely deep wells.

Other important objects of the invention are to provide for straightlift of the rods with a minimum of moving parts necessary t0 compensatefor arcuate movement of the pump beam; and to provide for maximumrigidity and bracing of the fixed parts of the rig.

In accomplishing Athese and other objects of the invention, ashereinafter pointed out, I have provided improved details of structure,the preferred form of which is illustrated in the accompanying drawings,wherein:

Fig. l is a perspective View of a pumping rig constructed in accordancewith the present invention.

Fig. 2 is a horizontal section through the rig on the line 2 2 of Fig.1.

Fig. 3 is a side elevational View of the pumping rig.

Fig. 4 is a vertical cross-section through the rig on the line 4 4 ofFig. 3.

Fig. 5 is a similar section on the line 5 5 of Fig. 3.

Referring more in detail to the drawings:

I designates a pumping rig constructed in accordance with the presentinvention and which includes a base frame 2, an upright guide support 3,and a Samson post structure 4. The base frame 2 includes spaced parallelsills `5 and 5 having I-beam section and arranged with the lower flanges1 forming skids 8 upon which the rig is supported. The upper flanges 9provide attaching support for the guide frame 3, Samsonpost 4 and atransmission Ill. The sills are spaced apart by cross members II, I2, I3and I4 and which have their ends welded or otherwise attached to thewebs of the sills. The lower flanges of the sills are cut back of theends of the upper flanges, as at I5, and welded thereto are angle shapednose plates I5 terminating in vertical plate portions II that are weldedto the upper anges of the sills.

Mounted on the cross beams I3 and I4 at the rear end of the base frameis the Samson post 50 structure 4 which includes spaced pairs ofuprights iB IQ and 20 2I of channel shaped section. The lower ends ofthe uprights are inset relatively to the sills but are secured theretoby gusset members 22 and have offset portions 23 whereby the upper endsthereof are located sub- (Cl. 'Z4-103) stantially over .the sills of thebase frame. The inner pair of uprights is slightly longer than the outerpair to connect with inclined braces 24 and 25 respectively connectingthe uprights with sides of the guide support 3. The lower portions ofthe uprights are connected by channels 26 and 2l', and the rear uprightsare connected by a cross member 23 at a point above the offsets.

The guide support 3 includes spaced uprights 29 and 30 having theirlower ends supported on the forward ends of the sills and securedthereto by suitable'gusset plates 3l. The top ends of the uprights arewelded to the braces 24 and 25 and are connected by cross channels 32 asbest shown in Fig. 1. The uprights are also spaced apart at a pointabove the transmission by a cross member 33 which cooperates with anI-section 34 to attach the ends of horizontal braces 35 and 35 that havetheir opposite ends connected with the pairs of uprights forming theSamson post structure previously described, the flanges of the bracesbeing preferably notched and welded .to the uprights as best shown inFig. 1.

Interconnecting the uprights I8 I 9 and 2li-2l 25 are channels 38 and 39carrying lower tracks 40 and 4I, on their upper anges. Cooperating withthe lower Vtracks 40 and 4I are upper bars or tracks `42 and l43 to formways 44 and 45 for flanged rollers 45 and 4T on a walking beam saddle4B. The saddle 43 has a plate to which a walkingbeam 43 is secured. Thewalking beam is also shown of I-section and has its forward endprojecting between the uprights of the guide support and its rear endextending beyond the 35 rear terminals of the tracks to carry aplurality of counterweights 5I! that are threaded on the end of the beamas in standard practice.

Supported on the forward end of the beam is a nose member 5I carrying arod hanger 52 to which the polish rod 53 is connected as in conventionalmanner. The nose member 5I is hingedly connected with an ear 54 attachedto the upper iiange of the walking beam by a pin 55 extending throughcooperating ears 55 on the 45 nose member. The nose member is latchinglyretained in operative position at the end of the beam by a pin 53passing through a sleeve carried on the lower ange of the beam andthrough the nose member. It is thus obvious that when the pin isinserted as shown in Figl, the nose member of the walking beam isrigidly secured from hinging movement, however, when the pin 58 isremoved and the polish rod disconnected from the hanger, the nose membermay be swung back from over the center of the well to permit pulling ofthe rods, tubing, or performing of other well operations.

Fixed to the lower ange of the walking beam, at a point ahead of theSamson post structure, is a plate S9 of a cross head 6i). The cross headcarries a transverse shaft $2 having its ends pivotally connected withpitmans 63 and 64 which have their lower ends connected with crank arms65 and 65 on the crank shaft $1 of the transmission. The actuating shaft68 of the transmission is provided with a pulley 69 that is driven by abelt 'it operating over a pulley 'll on the operating shaft of a primemover such as a motor l2.

With the structure thus far described it is obvious that rotation of thecranks cause oscillatory movement of the beam so that the forward endthereof would normally move in an arc about the a-xis of therollers 46and 4l, however, in order to provide for straight lift of the rods theforward end of the beam is retained for vertical movement while thewheels are caused to roll on the tracks to slide the beam relatively tothe Samson post. This is accomplished by providing the inner faces ofthe uprights forming the guide support with guide blocks i3 and M havingarcuate shaped guide grooves 15 and 'i6 positioned reversely to thenormal arcuate movement of the beam. The lower flange of the beamcarries a cross head Vl having rollers E8 and i9 operable in therespective guide grooves.

A pumping rig constructed as described is mounted on a suitablefoundation with the rod hanger 52 located directly over the axis of thewell when the beam is in horizontal position. The polish rod is thenconnected with the hanger and the transmission is operably connectedwith the prime mover such as the motor illustrated. Upon energization ofthe motor the pulley 'H drives the transmission pulley 69 through thebelt 'l0 to cause rotation of the cranks 65 and 6b and rocking of thebeam through the pitmans 63 and 64. As the beam moves above horizontalposition the rollers 18 and T9 operating in the respective guide groovesmove toward the upper ends of the slots causing the entire beam to bemoved forwardly with'the wheels 45 and 4l operating on tracks 4U and M.Forward movement of the beam is in exact synchronism with the upwardmovement of the beam so that the rod hanger is retained in directalignment with the axis of the well. As the cranks pass top dead centerthe movement of the beam is reversed so that the rollers move downwardlyin the guide grooves to shift the entire beam in a rearward direction,again maintaining the hanger in axial alignment with the well hole. Asthe beam moves below horizontal position it is again projected in aforward direction by reason of the rollers i8 and 19 entering the lowerportions of the guide grooves, again causing the beam to shift in aforward direction to maintain the alignment of the rod hanger. It isthus obvious that during oscillation of the beam a straight lift isexerted during the `entire stroke of the rods, thereby eliminating anytendency for the rods to buckle or bend under thrusts imparted by thebeam.

With the construction thus described the Samson post and guide supportare rigidly supported relatively to each other and while a straight liftis provided on the beam, the only moving parts art the wheels on whichthe beam fulcrums and the guide rollers that are carried in the forwardend of the beam to control relative sliding movement of the beam on theSamson post.

What I claim and desire to secure by Letters Patent is:

1. A well pumping apparatus including a support, a Samson post structurecarried on the support, a track carried by the Samson post structure, awalking beam, a shifting support on said track, means pivotally mountingthe walking beam on the shifting support, a guide support, cam meanscarried by the guide support adjacent one end of the beam, means on thebeam engaging the cam means for shifting the beam relatively to thetrack incidental to I rocking movement of the beam, means for rockingthe beam on said pivotal mounting, and brace means connecting the Samsonpost structure with the guide support.

2. A well pumping apparatus of the character .c

of the beam, means on the base frame for rock- ,l

ing the beam, a counterbalance fixed to the opposite end of the beam,and brace means connecting the Samson post structure with the guidesupport to resist thrusts imparted incidental to pivotal shifting of thebeam.

ALBERT N. PORTER.

